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-rw-r--r--pre_commit/xargs.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/pre_commit/xargs.py b/pre_commit/xargs.py
index 60a057c..6b0fa20 100644
--- a/pre_commit/xargs.py
+++ b/pre_commit/xargs.py
@@ -145,7 +145,9 @@ def xargs(
# this is implementation details but the command gets translated into
# full/path/to/cmd.exe /c *cmd
cmd_exe = parse_shebang.find_executable('cmd.exe')
- _max_length = 8192 - len(cmd_exe) - len(' /c ')
+ # 1024 is additionally subtracted to give headroom for further
+ # expansion inside the batch file
+ _max_length = 8192 - len(cmd_exe) - len(' /c ') - 1024
partitions = partition(cmd, varargs, target_concurrency, _max_length)